Yingru Xu

Heavy-flavor dynamics in relativistic p-Pb collisions at sNN=5.02 TeV

We investigate the heavy flavor dynamics in the quark-gluon plasma (QGP) medium created in p-Pb collisions at the CERN Large Hadron Collider (LHC). In the (3+1)-dimensional viscous hydrodynamcis model describing QGP medium, the dynamics of heavy quarks are studied in an improved Langevin framework incorporating both collisional and radiative energy loss. The hadronization of heavy quarks is described with a hybrid model of fragmentation and recombination. We find that the in-medium evolution of charm quarks raises the D meson

Traces of nonequilibrium dynamics in relativistic heavy-ion collisions

R_{pPb}

Traces of non-equilibrium dynamics in relativistic heavy-ion collisions

at low transverse momenta while it further suppresses the D meson

Data-driven analysis for the temperature and momentum dependence of the heavy-quark diffusion coefficient in relativistic heavy-ion collisions

R_{pPb}

A data-driven analysis of the heavy quark transport coefficient

at intermediate momenta. Our minimal bias calculation is in good agreement with the experimental data. In addition, the elliptic flow of D meson is calculated, showing a much smaller D meson

Quarkonium production in heavy ion collisions: coupled Boltzmann transport equations

v_2

Towards the extraction of heavy-quark transport coefficients in quark-gluon plasma

compared with the light hadrons. This observation hints that the coupling between heavy quarks and the medium being incomplete due to the reduced temperature and medium size.

Cracking the difference of estimating heavy quark transport coefficients in a Quark-Gluon Plasma.

The impact of nonequilibrium effects on the dynamics of heavy-ion collisions is investigated by comparing a nonequilibrium transport approach, the Parton-Hadron-String-Dynamics (PHSD), to a 2D+1 viscous hydrodynamical model, which is based on the assumption of local equilibrium and conservation laws. Starting the hydrodynamical model from the same nonequilibrium initial condition as in the PHSD, using an equivalent lQCD equation of state (EoS), the same transport coefficients, i.e., shear viscosity η and the bulk viscosity ζ in the hydrodynamical model, we compare the time evolution of the system in terms of energy density, Fourier transformed energy density, spatial and momentum eccentricities, and ellipticity to quantify the traces of nonequilibrium phenomena. In addition, we also investigate the role of initial pre-equilibrium flow on the hydrodynamical evolution and demonstrate its importance for final state observables. We find that because of nonequilibrium effects, the event-by-event transport calculations show large fluctuations in the collective properties, while ensemble averaged observables are close to the hydrodynamical results.

Modeling of quantum-coherence effects in parton radiative energy loss.

The impact of non-equilibrium effects on the dynamics of heavy-ion collisions is investigated by comparing a non-equilibrium transport approach, the Parton-Hadron-String-Dynamics (PHSD), to a 2D+1 viscous hydrodynamical model, which is based on the assumption of local equilibrium and conservation laws. Starting the hydrodynamical model from the same non-equilibrium initial condition as in the PHSD, using an equivalent lQCD Equation-of-State (EoS), the same transport coefficients, i.e. shear viscosity

A linearized Boltzmann--Langevin model for heavy quark transport in hot and dense QCD matter

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